Grace O'Brien, PA-C
NPI 1184963928 · Physician Assistant · Rocklin, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Grace O'Brien, PA-C is a Physician Assistant provider in Rocklin, CA (NPI 1184963928).
Provider details
- NPI number
- 1184963928
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Female
- Sole proprietor
- No
- License
- PA22820 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
13 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
551 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 145 | $157 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 142 | $105 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 132 | $74 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 68 | $118 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 34 | $107 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 17 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 5 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 20 | 19 |
| Ondansetronbrand: Ondansetron Odt | 18 | 15 |
| Cephalexin | 17 | 17 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 16 | 16 |
| Prednisone | 11 | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$83 across 3 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 550 Plaza Dr Ste 120Folsom, CA 95630-4779Phone: (916) 925-7020Fax: (916) 925-3680
Registry dates
- Enumerated
- 2013-02-13
- Last updated
- 2025-11-06
- Certified
- 2025-11-06
Frequently asked questions
- What is Grace O'Brien's NPI number?
- Grace O'Brien's National Provider Identifier (NPI) is 1184963928, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Grace O'Brien's specialty?
- Grace O'Brien is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Grace O'Brien located?
- Grace O'Brien's practice location on file with NPPES is 6544 Lonetree Blvd, Rocklin, CA 95765-5874.
- What is Grace O'Brien's phone number?
- The practice phone number listed in the NPPES registry for Grace O'Brien is (916) 925-7020.
- Does Grace O'Brien accept Medicare?
- Grace O'Brien is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Grace O'Brien's NPI active?
- Yes — Grace O'Brien's NPI (1184963928) is active in the NPPES registry as of the last update on 2025-11-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.